Quick-release valve



Aug. 27,1929. PQ R FORMAN y 1,726,102

QUICK RELEASEQVALVF:

Filed sept'. 24.11927 v-1meni .1 Aug. 2'7, 1929. l, y V l l 1,726,102M y UNITED. STATES VPATENT OFFICE. p

PARIs R. FORMAN, OE RAIIWAY, NEW JERSEY, AssIoNoR TO NATIONAL PNEUMATIo COMPANY; OE NEW YORK, N. Y., A CORPORATION OF WEST VIRGINIA.

j y QUICK-RELEASE VALVE.

Application led September' 24, y1927. Serial No. 2`21`,841.

d 9 therethrough and provided with a U- d shaped transversely extending passage as shown at 7. The inner end of the member This invention relates to a device arrange for permitting the rapid exhaust of. ilui from fluid pressure operated devices.

One of the objects of this invention is the provision of a device to be inserted in the which rests iiuid pressure line of iuid operated devices -provides a ballcheck valve which permits of to permit th/e flow of fluid from the source to the passage of fluid pressure through the the device'whilev checking its return. plunger in one direction (that, is upwardly A further object of this invention is to in Figure 2) and prevents its return. In a 10 provide in this device means whichv permits 4recess in the outer face of the saddle and se-v of the rapid exhaust of fluid from the fluid cured thereto by a machine screw 14' is a pressure operated device when the fiow of Washer 15 forming a valve seat. Into the fluid from the Source is out 0H', Other end 0f the Casing 1 ltS a plug 16 Which A further object of this invention is the has an internal projection 18 for cooperation provision of a simple device for carrying out Wlth the Valve Seat/15. A central bore v17 these functions and one which is relatively eXtendS'thlough-the plug 16 and the projecsmall in construction and arranged for rapidl tron 18. U A repairs, Y The fluid hne which extends from the the ball 11. This arrangement Those and other objects are Secured by source through a suitable control valve is` 20 means 0f this invention, y threaded 'ntO the pI'OjeCtiOn The feed Thi'sfinvention resides substantially in the 1111 t0' the Huid pressure operated device is construction, combination, arrangement` and SCIGWGd lIlO the PTOGCOII 2- When the relativo location of parts as will appear control valve is operated to supply fiuid presfrom the following disclosure, sure from the source the fluid flows into the Referring to the drawings, casing through the projection 3 through Figure lis an end elevational view of the pSSage 7 and into the space around plunger device from the'exhaust port end, and

Figure 2 is a cross-sectional vview ltaken that the valve seat-15 presses against the on; the line 2 2 of Figure 1. I projection `18 and closes the exhaust port In the operation of fluidpressure devices 17. The fluid pressure then forces the ball it has been usual to provide'some form of 11 upwardly against the action of spring '8 is provided-with a conical seat 1,0 within 12. This forces the plunger 12 forward so i quick release valve which will automatically 13` and permits the fluid to flow pastthe permit of the unobstructed application of plunger and out through projection 2 to fluid pressure to the Huid pressure-operated the fluid operation device. When the condevice and which' will automatically upon the trol valveI cuts off the supply of fluid from disconnection" of the device from the iiuid the source the back pressure inthe feed line source permit of the rapid exhaust "of the extending from projection 2 forces the fluid from the device. templates a relatively simple arran for carrying out these operations.

Referring tothe drawings, the valve is larg j shown comprising a casing "1 internallyfrapid exhaust of fluid from the fluid opthreaded at one end and externally threaded erated device. If necessary the control valve aty the other. Nearthe ends of the casing can be provided with a small yexhaust porty are the internally threaded projections 2 and so that when the valve is shut off the pres- 3 which provide passages into the casing. sure behind plunger 12 will be reduced to ScrewedA on to one end of the casing is a cap permit it to move backwardly and to permit 4: which forms a fluid tight seal there with in the ball 11 to seat. From the rforegoing conjunctiomwith the washer 6. An inwardlydisclosure-the construction and operation of extending lug 5 is threaded tothe cap 4f A iny device will be apparent tothose skilled small plungerfor piston 12 forming a snug in the art.

' sliding fit with the interior of the casing is `I am aware that many changes in the del provided with a bore rextending thereF tail O-fconstruction and relative association through. Screwed into one end of the of parts will be apparent to thosepworking plunger. is the member 8 having the passage in this art and l do not, therefore, wish to gement away from projection 18 and spring 13 seats o :the ball 11 on its seat 10. This. opens the This inventionconplunger 12 and with it the-valve seat 15 eexhaust port 17 and permits of the los l ilo the casinef havinga passage communicating 4 with the interior of the casing of a plunger in said casing carrying `a seat for closing the bore of said closure at its internally projecting end when fluid pressure is vadmitted to the casing through one of lsaid threaded projections.

2. In a quick release valve the combination with a closed casing of uniforminner diameter having two fluid pressure.ports and an exhaust port with an internally projecting rim of a plunger in said casing carrying a seat for sealing the lips of said e'xhaust port when fluid pressure is applied to one of said fluid-pressure ports and ball check means for permitting fluid pressure to uni-directionally pass said plunger to the other of said fluid pressure ports.

3. In a quick release valve the combination with a closed casing of uniform inner diameter having two vfluid pressure ports and an exhaust port with an internally projecting rim of a plunger in said casing, a seat on said plunger for closingl said exhaust port in one -position of said plunger and a ball check valve in said plunger arranged over a centrally disposed passage through said plunger to admit fluid pressure past said plunger when the seat on A said plunger has sealed said exhaust port.

4. Ina quick release valve the combination with a closed casing of uniform inner diameter having two fluid pressure ports and an exhaust port withan internallyv rojecting rim of a plunger in said casing forming a snug sliding fit therewith, a seat on said plunger for sealing said exhaustport, said plunger. having a centrally disposed passage therethrough, and `a` spring actuated ball vcheck valve in said plunger and over said plunger/passage fory normally closing said passage in said plunger, said plunger mov ing to seal said exhaust port when fluid pressure is admitted behind said plunger through one of said fluid pressure ports and said ball check valve at the same time moving to uncover the passage in said plunger to admit fluid pressure to the other of said fluid pressure ports on the seating ofsaid plunger carried seat.

5. In a quick release valve the combination .with a closed casing of uniform inner diameter having two fluid pressure ports and an exhaust port with an internally projecting rim of a. plunger in said casing, sealing means on said plunger for closing said exhaust port and check means on said plunger for admitting fluid pressure supplied' behind said-plunger from one of said fluid pressure ports to the other of said fluid pressure ports, said sealing means being adapted to uncover said exhaust'port when the fluid pressure supply is cut olf and said `mr ans on said plunger are'closed, thereby causing the fluid'pressure yto escape through said exhaust port, while withholding any feeding of said pressure back into saidfluid pressure supply.

In testimony whereof "I have'ihereunto setv my hand on this 19thday ofASeptember A.y

lmais R. FORMAN.`

fso p 

